Problem with current version, ignores style.css of child theme

Old problems have come back with the current version:

There is a problem with one of the CSS settings. As advise last timed, I deleted WPFC and installed it again, didn’t help. WPFC seems to ignore my style.css in the child theme. Disabling “Combine CSS” solves this problem and everything is back to normal.

Dear Emre Vona, is there another quick fix for this issue like last time?

Thanks!
Daniel